Necticut



SHERMAN & BISHOP.

Stop for Preventing Retrograde Motion in'S'ewing Machines.

No. 93,014. Y Patented July 27, 1869.

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WESLEY SHERMAN AND GILES BISHOP, OF MIDDLETOWN, CON- NECTICUT.

Lam Patent No. 93,014, dated July 27, 1869.

IMPROVEMENT IN STOP FOR PREVENTING RETROG-RADE MIOTION IN SEWING-MACHINES.

The Schedule referred to in these Letters Patent and making part ofthe,same.

To all whom it may concern:

Be it known that we, WESLEY SHERMAN and GILES BIsHoP, both ofMiddletown, in the county of Middlesex, and State of Connecticut, haveinvented a new and improved Device, Method, or Mode for PreventingRetrograde Motion in Sewing-Machines; and wedo hereby declare that thefollowing is a'full and exact description thereof, reference being badto the accompanying drawings, and the letters of reference markedthereon.

The nature of our invention consists in providing a self-acting pawl orstop-lever, in two parts, and tipped with a bit of leather, cork,rubber, or their equivalent, to hang by a hinge from the under side ofthe table or frame of the sewing-machine, just over the balance-wheel,and to reach down to and rest upon and fit to the rim of thebalance-wheel in such manner that any tendency to retrograde motion isprevented, and at the same time forms no obstruction to the forwardmotion of the machine. I

To enable others skilled in the art to make and use our invention, wewill proceed to describeits construction and operation.

The pawl or stop-lever is constructed of wood, metal, cork,orgutta-percha, and is made in two parts; one part is provided with ascrew-end, and the other part with a threaded aperture.

These parts are fastened together by means of the screw-end and threadedaperture.

WVe construct it in two parts in this manner, so that by means of thescrew, the pawl or lever may be shortened or lengthened at pleasure, toadapt it to all sizes and styles of sewing-machines, letter A, of

I drawing No. 1, representing the pawl or stop-lever,

and a of the same drawing representing the screw just referred to.

And we further provide the lower end of the pawl or stop-lever with theslot b of drawing No. 1, which is also shown in drawing No. 2, (N 0. 2being a View of the pawl or stop-lever detached from the machine,) intowhich we insert a bit of cork, leather, rubber, or their equivalent, asshown by letter 0 of drawing No. 1, out upon that side of it that comesin contact with the wheel, in such shape (as shown by e of drawing No.2) as shall correspond with and fitthe rim of the in contact with thatside of the-cork, leather, orrubber tip of the pawl or lever, and thusmore effectually prevent any tendency to retrograde motion.

This pawl or lever A we then hang in the hinge d of drawings No. -1 andNo. 2. which isli'astened to the under side of the table or frame of thesewing-machine, (as shown in No.1 of the drawings) just above and alittle to one side of the centre of the balancewheel, so that the tippedend of the pawl or lever will meet and rest down upon the rim of thebalancewheel in such manner, and at that point upon the wheel where, itthere is the slightest attempt at retrograde, motion, it will be met byimmediate and strong resistance, and at the same time will offer noobstruction to the forward motion of the machine; this tipped end of thepawl or lever being made to hug, by means of the weight of the pawl andthe shape of the contact side of the tip, the rim of the balance-wheel,and by these means, and partly by the hinge, the said pawl is keptsecurely in its place upon the rim of the wheel, and furnishes anedectual stop to retrograde motion of the machine.

We hang the pawl or lever upon the hinge d of the drawings No. 1 and No.2, so that it may have unrestricted play and furnish no obstruction tothe forward motion of the machine. "What we claim as our invention, anddesire to secure by Letters Patent, is

The self-acting hanging pawl or stop-lever A in two parts, constructedand operating substantially as hereinbef'ore described, when applied tosewing-machines, as and for the purpose described.

WESLEY SHERMAN. GILES BISHOP.

